Year	Cases per 100,000
1990	9.21
1991	9.19
1992	9.18
1993	9.17
1994	9.16
1995	9.15
1996	8.86
1997	8.58
1998	8.31
1999	8.04
2000	7.79
2001	7.7
2002	7.61
2003	7.52
2004	7.43
2005	7.34
2006	7.37
2007	7.4
2008	7.43
2009	7.47
2010	7.5
2011	7.57
2012	7.65
2013	7.72
2014	7.8
2015	7.87
2016	7.95